Restore Server

The domain controllers are backed up each night by using a normal backup
that also captures the system state. You are responsible for creating a domain
controller recovery plan to be used if a domain controller fails in either office.
You need to include in your recovery plan the process for restoring Active
Directory services if any of the domain controllers suffers a hardware failure.
The plan must also minimize restoration time?
A. Restore the system state of any domain controller to an available member server
in the same network subnet
B. Perform an authoritative restore operation on a functioning domain controller
C. On an available member server in the same network subnet as the failed domain
controller, run the dcpromo /adv command and select the Over the network
option
D. On an available member server in the same network subnet as the failed domain
controller, run the dcpromo /adv command and select the From these restored
backup files option
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I think authorative restore makes it to the earlier point and solves issue.